|Diameter:||29.50 mm (13 ligne)|
|Complications:||2-Button, 7-Column Chronograph, Chronograph, Column Wheel Chronograph|
|Production: 1946 – 1950|
Valjoux Cal. 77 is a column wheel chronograph movement. Unusually for Valjoux, it has seven columns in the wheel used to control the chronograph function and also uses Heuer’s oscillating pinion engagement design. It is a two-pusher movement with a 30 minute chronograph register. Cal. 77 was produced from 1946 through about 1950. The Valjoux 92 was a descendent of Cal. 77.
Valjoux designed the unusual Cal. 77 with two goals: It implemented the oscillating pinion for use by Heuer, and it replaced many complex milled components with springs to reduce cost.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.